feat: return initial admin password from install flow

src/model/data/admin_user_data_test.go

@@ -118,6 +118,55 @@ func TestUpdateAdminUserPasswordHardDeletesInitialPasswordPlaintext(t *testing.T
 	}
 }
 
+func TestUpdateAdminUserPasswordHardDeletesPlaintextWithoutHashMetadata(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	const (
+		oldPassword = "legacy-init-pass"
+		newPassword = "new-password-456"
+	)
+	if err := upsertSettingRow(dao.Mdb, mdb.Setting{
+		Group: mdb.SettingGroupSystem,
+		Key:   mdb.SettingKeyInitAdminPasswordPlain,
+		Value: oldPassword,
+		Type:  mdb.SettingTypeString,
+	}); err != nil {
+		t.Fatalf("seed plaintext setting: %v", err)
+	}
+
+	hash, err := HashPassword(oldPassword)
+	if err != nil {
+		t.Fatalf("hash password: %v", err)
+	}
+	user := &mdb.AdminUser{
+		Username:     defaultAdminUsername,
+		PasswordHash: hash,
+		Status:       mdb.AdminUserStatusEnable,
+	}
+	if err := dao.Mdb.Create(user).Error; err != nil {
+		t.Fatalf("seed admin user: %v", err)
+	}
+
+	if err := UpdateAdminUserPassword(uint64(user.ID), newPassword); err != nil {
+		t.Fatalf("update admin password: %v", err)
+	}
+
+	var count int64
+	if err := dao.Mdb.Unscoped().
+		Model(&mdb.Setting{}).
+		Where("`key` = ?", mdb.SettingKeyInitAdminPasswordPlain).
+		Count(&count).Error; err != nil {
+		t.Fatalf("count plaintext setting: %v", err)
+	}
+	if count != 0 {
+		t.Fatalf("plaintext setting rows after password change = %d, want 0", count)
+	}
+	if !GetSettingBool(mdb.SettingKeyInitAdminPasswordFetched, false) {
+		t.Fatal("expected fetched flag to be true after clearing plaintext")
+	}
+}
+
 func TestEnsureDefaultAdminPurgesLegacySoftDeletedPlaintext(t *testing.T) {
 	cleanup := testutil.SetupTestDatabases(t)
 	defer cleanup()
@@ -164,3 +213,55 @@ func TestEnsureDefaultAdminPurgesLegacySoftDeletedPlaintext(t *testing.T) {
 		t.Fatalf("legacy plaintext rows after ensure = %d, want 0", count)
 	}
 }
+
+func TestEnsureDefaultAdminRollsBackWhenInitialPasswordStateFails(t *testing.T) {
+	cleanup := testutil.SetupTestDatabases(t)
+	defer cleanup()
+
+	if err := dao.Mdb.Exec(`
+CREATE TRIGGER fail_initial_password_state
+BEFORE INSERT ON settings
+WHEN NEW.key = 'system.init_admin_password_plain'
+BEGIN
+	SELECT RAISE(FAIL, 'forced initial password state failure');
+END;
+`).Error; err != nil {
+		t.Fatalf("create failure trigger: %v", err)
+	}
+
+	password, created, err := EnsureDefaultAdmin()
+	if err == nil {
+		t.Fatal("expected EnsureDefaultAdmin to fail")
+	}
+	if created || password != "" {
+		t.Fatalf("created=%v password=%q, want no created admin on failure", created, password)
+	}
+
+	var adminCount int64
+	if err := dao.Mdb.Model(&mdb.AdminUser{}).Count(&adminCount).Error; err != nil {
+		t.Fatalf("count admin users after failure: %v", err)
+	}
+	if adminCount != 0 {
+		t.Fatalf("admin users after failed initial password state = %d, want 0", adminCount)
+	}
+
+	if err := dao.Mdb.Exec(`DROP TRIGGER fail_initial_password_state`).Error; err != nil {
+		t.Fatalf("drop failure trigger: %v", err)
+	}
+
+	password, created, err = EnsureDefaultAdmin()
+	if err != nil {
+		t.Fatalf("retry EnsureDefaultAdmin: %v", err)
+	}
+	if !created || password == "" {
+		t.Fatalf("retry created=%v password=%q, want new admin with password", created, password)
+	}
+
+	got, err := GetInitialAdminPassword()
+	if err != nil {
+		t.Fatalf("get initial password after retry: %v", err)
+	}
+	if got != password {
+		t.Fatalf("initial password after retry = %q, want %q", got, password)
+	}
+}